2017 TOYOTA 4RUNNER ECU

1884-1. Before driving
4RUNNER (U)_(OM35B37U)■
Before towing
Check that the following conditions are met:
●Ensure that your vehicle’s tires are properly inflated. ( →P. 472)
● Trailer tires are inflated according to the trailer manufacturer’s recommen-
dation.
● All trailer lights work as required by law.
● All lights work each time you connect them.
● The trailer ball is set at the proper height for the coupler on the trailer.
● The trailer is level when it is hitched.
Do not drive if the trailer is not level, and check for improper tongue weight,
overloading, worn suspension, or other possible causes.
● The trailer cargo is securely loaded.
● The rear view mirrors conform to all applicable federal, state/provincial or
local regulations. If they do not, install rear view mirrors appropriate for tow-
ing purposes.
■ Break-in schedule
If your vehicle is new or equipped with any new power train components
(such as an engine, transmission, differential or wheel bearing), Toyota rec-
ommends that you do not tow a trailer until the vehicle has been driven for
over 500 miles (800 km).
After the vehicle has been driven for over 500 miles (800 km), you can start
towing. However, for the next 500 miles (800 km), drive the vehicle at a speed
of less than 45 mph (72 km/h) when towing a trailer, and avoid full throttle
acceleration.
■ Maintenance
●If you tow a trailer, your vehicle will require more frequent maintenance due
to the additional load. (See “Scheduled Maintenance Guide” or “Owner’s
Manual Supplement”.)
● Retighten the fixing bolts of the towing ball and bracket after approximately
600 miles (1000 km) of trailer towing.
■ If trailer sway occurs
One or more factors (crosswinds, passing vehicles, rough roads, etc.) can
adversely affect handling of your vehicle and trailer, causing instability.
●If trailer swaying occurs:
• Firmly grip the steering wheel. Steer straight ahead.
Do not try to control trailer swaying by turning the steering wheel.
• Begin releasing the accelerator pedal immediately but very gradually to reduce speed.
Do not increase speed. Do not apply vehicle brakes.
If you make no extreme correction with the steering or brakes, your vehicle
and trailer should stabilize. (if enabled, Trailer Sway Control can also help to
stabilize the vehicle and trailer.)

1904-1. Before driving
4RUNNER (U)_(OM35B37U)
CAUTION
●Do not apply the brakes suddenly as you may skid, resulting in jackknifing
and loss of vehicle control. This is especially true on wet or slippery sur-
faces.
● Do not exceed the trailer hitch assembly weight, gross vehicle weight,
gross axle weight and trailer tongue weight capacities.
● Do not use cruise control when towing.
● Slow down and downshift before descending steep or long downhill
grades. Do not make sudden downshifts while descending steep or long
downhill grades.
● Vehicle-trailer instability is more likely on steep long downhills. Before
descending steep or long downhill grades, slow down and downshift. Do
not make sudden downshifts when descending steep or long downhill
grades. Avoid holding the brake pedal down too long or applying the
brakes too frequently. This could cause the brakes to overheat and result
in reduced braking efficiency.
■ Hitch
Trailer hitch assemblies have different weight capacities established by the
hitch manufacturer. Even though the vehicle may be physically capable of
towing a higher weight, the operator must determine the maximum weight
rating of the particular hitch assembly and never exceed the maximum
weight rating specified for the trailer-hitch. Exceeding the maximum weight
rating set by the trailer-hitch manufacturer can cause an accident resulting
in death or serious personal injuries.
■ When towing a trailer
Toyota recommends trailers with brakes that conform to any applicable fed-
eral and state/provincial regulations.
● If the gross trailer weight exceeds unbraked TWR, trailer brakes are
required. Toyota recommends trailers with brakes that conform to all appli-
cable federal and state/provincial regulations.
● Never tap into your vehicle’s hydraulic system, as this will lower the vehi-
cle’s braking effectiveness.
● Never tow a trailer without using a safety chain securely attached to both
the trailer and the vehicle. If damage occurs to the coupling unit or hitch
ball, there is danger of the trailer wandering into another lane.

2144-3. Operating the lights and wipers
4RUNNER (U)_(OM35B37U)
Ty p e ATurns the front fog lights
off
Turns the front fog lights
on
Fog light switch
The fog lights secure excellent visibility in difficult driving con-
ditions, such as in rain and fog.
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2234-4. Refueling
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Driving
4RUNNER (U)_(OM35B37U)
CAUTION
■When refueling the vehicle
Observe the following precautions while refueling the vehicle. Failure to do
so may result in death or serious injury.
● After exiting the vehicle and before opening the fuel door, touch an
unpainted metal surface to discharge any static electricity. It is important to
discharge static electricity before refueling because sparks resulting from
static electricity can cause fuel vapors to ignite while refueling.
● Always hold the grips on the fuel tank cap and turn it slowly to remove it.
A whooshing sound may be heard when the fuel tank cap is loosened.
Wait until the sound cannot be heard before fully removing the cap. In hot
weather, pressurized fuel may spray out the filler neck and cause injury.
● Do not allow anyone that has not discharged static electricity from their
body to come close to an open fuel tank.
● Do not inhale vaporized fuel.
Fuel contains substances that are harmful if inhaled.
● Do not smoke while refueling the vehicle.
Doing so may cause the fuel to ignite and cause a fire.
● Do not return to the vehicle or touch any person or object that is statically
charged.
This may cause static electricity to build up, resulting in a possible ignition
hazard.
■ When refueling
Observe the following precautions to prevent fuel overflowing from the fuel
tank:
● Securely insert the fuel nozzle into the fuel filler neck.
● Stop filling the tank after the fuel nozzle automatically clicks off.
● Do not top off the fuel tank.
NOTICE
■Refueling
Do not spill fuel during refueling.
Doing so may damage the vehicle, such as causing the emission control
system to operate abnormally or damaging fuel system components or the
vehicle’s painted surface.

3075-3. Using the storage features
5
Interior features
4RUNNER (U)_(OM35B37U)■
Cargo hooks
Vehicles with third seats
Fold down the third seats. ( →P. 129)
Raise the hook to use.
The cargo hooks are provided
for securing loose items.
Vehicles without third seats
Raise the hook to use.
The cargo hooks are provided
for securing loose items.
Luggage compartment features
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3115-3. Using the storage features
5
Interior features
4RUNNER (U)_(OM35B37U)
CAUTION
■When the cargo hoo ks are not in use
To avoid injury, always return the cargo hooks to their stowed positions.
■ Slide deck operating pr ecaution (if equipped)
● Be careful not to get hands or feet pinched by the slide deck.
● Be careful not to allow the slide deck to hit any persons or luggage while
sliding the deck.
● Do not operate the slide deck while someone is on it.
Doing so may cause an accident.
● If operating the slide deck when the vehicle is stopped on an incline, the
slide deck may move faster. Be careful not to allow the slide deck to hit
you or pinch your fingers etc.
● After sliding the deck, make sure it is securely locked in position.
● Do not close the back door while any person is sitting on the slide deck or
any person is between the slide deck and back door.
● Do not stow any objects into the space between the slide deck rails.
NOTICE
■To prevent damage to the cargo net hooks
Avoid hanging things other than a cargo net on them.
■ Slide deck weight capacity (if equipped)
Do not load anything heavier than 440 lb. (200 kg) on the sliding deck.
■ Grocery bag hook weight capacity
Do not hang any object heavier than 8.8 lb. (4 kg) on the grocery bag hooks.
■ When using the slide deck (if equipped)
● Do not close the back door while the slide deck is sliding out. Doing so
may cause the back door or slide deck to break.
● If operating the slide deck when the vehicle is stopped on an incline, the
slide deck may move faster. Be careful as luggage may become damaged
or fly out and damage the cabin.

3175-4. Other interior features
5
Interior features
4RUNNER (U)_(OM35B37U)■
If the protection circuit is activated and the power supply is cut, conduct
the following procedure:
Park the vehicle in a safe place, and then securely apply the parking
brake.
Check and ensure that the shift lever is in P or N.
Make sure that the power consumption of the electric appliance is within
the maximum capacity of the power outlet and the appliance is not bro-
ken.
Press the power outlet main switch again.
When the cabin temperature is high, open the windows to cool the tempera-
ture down. Once it reaches the normal temperature, turn the power outlet
main switch on again.
If the power supply does not resume even after the above procedure has
been performed, have the vehicle inspected by your Toyota dealer.
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3185-4. Other interior features
4RUNNER (U)_(OM35B37U)
CAUTION
■Using a power outlet
Observe the following precautions to reduce the risk of injury.
● Use of the power outlet when it is wet with water or snow may result in
electrical shocks and is extremely dangerous. The power outlet must be
thoroughly dried before use.
● Do not allow children to use or play with the power outlet.
● Be careful not to get any part of your body caught in the power outlet lid.
● When using electrical appliances, strictly follow any cautions and notices
written on their labels and in the manufacturers' instruction manuals.
● Do not modify, disassemble or repair the power outlet or its inverter in any
way. Doing so may result in unexpected malfunctions or accidents, which
could cause serious damage or injuries. Contact your Toyota dealer for
any necessary repairs.
■ To prevent injuries and accidents, secure all electric appliances before
use and do not use any appliances th at may do any of the following:
● Distract the driver while driving, or hamper safe driving.
● Result in a fire or burn injuries due to the appliance rolling, falling or over-
heating while driving.
● Emit steam while the windows of the cabin are closed.
■ To prevent unexpected accidents, su ch as electric shocks, do not per-
form any of the following actions:
● Using the power outlet for electric heaters while sleeping.
● Contaminating the power outlet with liquid substances or mud.
● Handling electrical appliance plugs at the power outlet with wet hands or
feet.
● Inserting foreign objects into the power outlet.
● Using malfunctioning electric appliances.
● Inserting inappropriate or badly fitting plugs into the power outlet.